Ice Shards + Delayed Reaction

Combo does nothing, shards stay armed on the ground for ever, probably because the skill itself doesnt have a duration but only arm time ( 1.5 seconds) and triggers only when enemies step on it.

With the support gem you prevent enemies from triggering the shard by stepping on them but also nothing happen after a duration, because in fact skill duration is missing on the tooltip so my question:

Whats the duration of the shards?

*I'm going to try the other part of the support gem which is

"Hazards created by Supported Skills cannot be triggered by enemies unless triggered immediately on creation"

by using reduced skill duration + compressed duration but the second part looks bugged to me.
Thoughts appreciated from xbow players.

https://www.poe2wiki.net/wiki/Ice_Shards

https://www.poe2wiki.net/wiki/Delayed_Reaction

Edit: Compressed duration cannot even be socketed into ice shard :D